Table 1 Properties of cementitious materials21,28.

From: Multi-criteria decision-based optimization and multivariable regression analysis of date palm fiber reinforced concrete modified with silica fume under normal and elevated temperatures

Chemical oxides/properties

Cement

Silica fume

SiO2

19.71

95.85

Fe2O3

3.40

0.05

Al2O3

5.39

0.26

CaO

65.18

0.21

SO3

3.51

1.00

K2O

1.22

−

MgO

0.91

0.45

TiO2

0.24

−

MnO

0.18

−

P2O5

0.09

−

Na2O

0.17

−

Specific gravity

3.15

2.3

Specific surface area (m2/kg)

225

18,000

Bulk density (kg/m3)

1440

630

Loss of ignition (%)

2.38

2.80

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